Bi-annual	US dollars
1987-06-30	24
1987-12-31	21
1988-06-30	17
1988-12-31	20
1989-06-30	19
1989-12-31	18
1990-06-30	26
1990-12-31	15
1991-06-30	3
1991-12-31	4
1992-06-30	4
1992-12-31	15
1993-06-30	9
1993-12-31	4
1994-06-30	11
1994-12-31	14
1995-06-30	17
1995-12-31	14
1996-06-30	14
1996-12-31	17
1997-06-30	10
1997-12-31	58
1998-06-30	63
1998-12-31	95
1999-06-30	107